refactor: updated set data method and add a new test for data obj

Author: shortdiv

packages/test-utils/src/wrapper.js

@@ -421,7 +421,14 @@ export default class Wrapper implements BaseWrapper {
 
     Object.keys(data).forEach((key) => {
       // $FlowIgnore : Problem with possibly null this.vm
-      this.vm.$set(this.vm, [key], data[key])
+      if (typeof data[key] === typeof {} && data[key] !== null) {
+        Object.keys(data[key]).forEach((key2) => {
+          var newObj = Object.assign({}, data[key], data[key][key2])
+          this.vm.$set(this.vm, [key], newObj)
+        })
+      } else {
+        this.vm.$set(this.vm, [key], data[key])
+      }
     })
   }
 

test/specs/wrapper/setData.spec.js

@@ -132,4 +132,25 @@ describeWithShallowAndMount('setData', (mountingMethod) => {
     wrapper.setData({ message: null })
     expect(wrapper.text()).to.equal('There is no message yet')
   })
+  it('should update a data object', () => {
+    const Cmp = {
+      data: () => ({
+         anObject: {
+           propA: {
+             prop1: 'a'
+           },
+           propB: 'b'
+         }
+      })
+    }
+    const wrapper = mountingMethod(Cmp)
+    wrapper.setData({
+      anObject: {
+        propA: {
+          prop1: 'c'
+        }
+      }
+    })
+    expect(wrapper.vm.anObject.propA.prop1).to.equal('c')
+  })
 })